It's about 150,000,000,000 times as heavy as a Brick
In other words, 400,000,000 tonnes is 140,000,000,000 times the weight of a Brick, and the weight of a Brick is 0.0000000000071 times that amount.(Standard, traditional face brick - 1,900 cu. cm (120 cu. in))
A standard, traditional face brick weighs an average of 0.0029 tonnes. The steeple of the Church of St. Martin in Landshut, Germany is said to be the tallest brick tower in the world at a height of 130.6 m (428.5 ft) and was constructed using an estimated 650,000 bricks.
It's about 200,000,000,000 times as heavy as a Chihuahua
In other words, 400,000,000 tonnes is 178,000,000,000 times the weight of a Chihuahua, and the weight of a Chihuahua is 0.00000000000562 times that amount.(a.k.a. Chihuahue(o) (FCI standard)
The F&d&ration Cynologique Internationale (FCI) calls for Chihuahuas to weigh about 0.00225 tonnes. Relative to their body sizes, Chihuahuas have the largest brain size of any dog breed.
It's about 300,000,000,000 times as heavy as a Human Brain
In other words, 400,000,000 tonnes is 296,000,000,000 times the weight of a Human Brain, and the weight of a Human Brain is 0.00000000000338 times that amount.(adult)
The average weight of an adult human brain is between 0.00135 tonnes. In humans and primates, sight and vision utilize about 30 different parts of the brain which together account for about half of the brain's size.
It's about 400,000,000,000 times as heavy as a liter of Water
In other words, 400,000,000 tonnes is 399,988,800,000 times the weight of a liter of Water, and the weight of a liter of Water is 0.00000000000250007 times that amount.(fresh; 4° C / 39.2° F; maximum density)
Contrary to popular belief, 1 liter (0.0.264172052358148 gal) of water at 4° C / 39.2° F (its point of maximum density) weighs 0.001000028 tonnes rather than 1 kg exactly. The total volume of water on the planet Earth is about 13,590,000,000,000,000,000 (13.59 quntillion) L (3,590,000,000,000,000,000 gallons).
It's about 650,000,000,000 times as heavy as a Basketball
In other words, 400,000,000 tonnes is 641,344,762,720 times the weight of a Basketball, and the weight of a Basketball is 0.0000000000015592237719 times that amount.(NBA official ball standards, Size 7)
A regulation NBA basketball, manufactured by Spalding, is known as a Size 7 ball and weighs 0.00062368950875 tonnes. These balls have 4,118 pebbles each with a diameter of 2.5 mm
It's about 950,000,000,000 times as heavy as a Football (Soccer)
In other words, 400,000,000 tonnes is 930,000,000,000 times the weight of a Football (Soccer), and the weight of a Football (Soccer) is 0.0000000000011 times that amount.(a.k.a. Soccer, a.k.a. Association Football) (FIFA Law 2 specification)
According to FIFA's Law of the Game number 2, a football must weigh between 0.00041 tonnes and 0.00045 tonnes. An artifact on display at the Smith Art Gallery in Museum in Stirling, Scotland is said to be the world's oldest football and is about one-third to one-half the size of a modern football.
It's about 950,000,000,000 times as heavy as a Football (American)
In other words, 400,000,000 tonnes is 973,074,812,402.2 times the weight of a Football (American), and the weight of a Football (American) is 0.000000000001027670213281 times that amount.(a.k.a. "pigskin") (NFL standard)
Per National Football League official rules, an American football must weigh between 0.00039689332375 tonnes and 0.000425242846875 tonnes. Because of NFL regulations, ceremonial considerations, and backup requirements, each NFL Superbowl requires the manufacture of 144 balls exclusively for the event.